* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 20px;
    font-family: sans-serif;
}

body {
    max-width: 640px;
    margin: 0 auto;
}

ol {
    list-style-type: none;
    counter-reset: a
}

ol li:before {
    content: counter(a) "\3001";
    counter-increment: a
}

@media only screen and (min-width: 320px) {
    html {
        font-size: 18.33333333px !important;
    }
}

@media only screen and (min-width: 400px) {
    html {
        font-size: 21.33333333px !important;
    }
}

@media only screen and (min-width: 414px) {
    html {
        font-size: 22.08px !important;
    }
}

@media only screen and (min-width: 480px) {
    html {
        font-size: 25.6px !important;
    }
}